def calculate_bmi(weight,height):
    bmi=weight/height**2
    if bmi <= 18.5:
        catogery="偏瘦"
    elif 18.5 < bmi <= 25:
        catogery="正常"
    elif 25 < bmi <= 30:
        catogery="偏胖"
    else:
        catogery="肥胖"
    print(f"bmi分类为：{catogery}")
    return bmi

c=calculate_bmi(60,1.8)
print(c)